Baucus retires, joining seven other senators

In this April 17, 2013 file photo, Sen. Max Baucus, D-Mont. is seen on Capitol Hill in Washington. There is little mystery, from a campaign viewpoint, at least, about the eight senators who crossed party lines in Wednesday's showdown vote on background checks for gun buyers. The four Democrats who voted against broader background checks are from largely rural states that voted heavily against President Barack Obama last fall. (AP Photo/J. Scott Applewhite, File)

Baucus retires, joining seven other senators

Democratic Sen. Max Baucus, the third longest-serving member now in the Senate, has announced he will retire when his current term ends in 2015.The Montana senator joins seven other senators who are retiring, five of whom are Democrats.Here's a quick rundown of retiring senators, according to Roll Call's Casualty List.Sen. Saxby Chambliss, R-Ga.(AP)The two-term Republican announced in January that he would not run again. Though he denied it, some commentators speculated that his vulnerability to a primary challenger was a …